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A306750
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Least prime of exactly n consecutive primes all of which are regular.
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0
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61, 137, 239, 41, 2447, 71, 4271, 3331, 3701, 3, 15193, 10253, 163, 107053, 51343, 1185313, 584557, 491299, 2696021, 4042523, 10872649, 6806243, 8738641, 6925999, 17669539, 120490499, 17881, 14906383, 211144489, 510669881, 126276229, 1913754191
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OFFSET
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1,1
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COMMENTS
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Calculated from the list of primes by Hart et al.
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LINKS
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Table of n, a(n) for n=1..32.
William Hart, David Harvey and Wilson Ong, Irregular primes to two billion, Mathematics of Computation, Vol. 86, No. 308 (2017), pp. 3031-3049; also available at arXiv:1605.02398 [math.NT], 2016.
David Harvey, Irregular primes to two billion (includes a list of all primes less than 2^31).
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EXAMPLE
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a(1) = 61 since it is regular and both its neighboring primes 59 and 67 are irregular.
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CROSSREFS
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Cf. A007703, A000928, A105019.
Sequence in context: A073761 A142093 A063337 * A142172 A168023 A044312
Adjacent sequences: A306747 A306748 A306749 * A306751 A306752 A306753
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KEYWORD
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nonn,more
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AUTHOR
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Amiram Eldar, Mar 07 2019
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STATUS
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approved
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